in 1002 written "The last line of input file contains call number −1."
judge tells me on test #3 - Wrong Answer (in the end of input data there is no '-1' string), but when I add '-1' string it works correctly, my program i mean.

what can you tell me about this problem?

and what should i do if i am sure that my programm is correctly working, but the Timus Judge tells me that there is "Wrong answer"?

I do too
Please tell me if you understand that. thanks